I built a query input form with autocomplete in Jquery.

I want to fetch data from an API after the user has selected a value from the input.

Here is the JS on my HTML view. The input form autocomplete on search works fine but on selection, the page returns a 400 BAD Request error. I'm suspecting I have an issue with the way I'm calling the queryData function on select, but I don't know what I'm doing wrong.

<script>
        $(function() {
            $("#searchBox").autocomplete({
                source : function(request, response) {
                    $.ajax({
                        type: "POST",
                        url : "/search",
                        dataType : "json",
                        cache: false,
                        data : {
                            q : request.term
                        },
                        success : function(data) {
                            var aData=$.map(data, function(item){
                                return{
                                    label: item.Name + " (" + item.Symbol + ")",
                                    value: item.Symbol
                                }
                            });
                            response(aData);
                        },
                        error: function(jqXHR, textStatus, errorThrown) {
                            console.log(textStatus + " " + errorThrown);
                        }
                    });
                },
                minLength : 2,
                select: queryData
            });
        });

        const queryData = async (event, ui) => {
            console.log(ui.item.value);
            let response = await fetch('http://localhost:5000/getdata?q=' + ui.item.value);
            console.log("response", response)
            let stockdata = await response.text();
            document.querySelector('ul').innerHTML = stockdata;
        }

    </script>

Here is also the getData route:

@app.route("/getdata", methods=['GET', 'POST'])
def getdata():
    term = request.form['q']

    finnhub_client = finnhub.Client(api_key="xx")

    response = finnhub_client.company_earnings("AAPL", limit=5)
            
    return response